by Allen J. McGrew and Elizabeth L. Miller ; compiled by Janet L. Brown ; U.S. Department of the Interior, U.S. Geological Survey ; prepared in cooperation with the U.S. National Park Service. Relief shown by contours and spot heights. Includes 1 cross section (sheet 3). Three sheets (map and coss section) and accompanying text in envelope. Includes bibliographical references (p. 7-8 of text).